AMD has been talking about a new FX model since the Phenom was released, never happen. But like said, with the BE I dont really get the point of one. Unless they think with a FX name it might magically sell better. The last two FX I had, the FX 60 and 62 didnt overclock worth a crap anyway.
The Phenom II AM2+ 940BE and the AM2+/3 720BE are models with a unlocked X just like the FX was.